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The wintering management of *Astragalus membranaceus* typically involves several methods, depending on the scale and resources available. One common approach is to transplant all the plants into a greenhouse for protection during the cold season. This method is particularly suitable for aquaculture setups where controlled environments are already in place. Another option is to construct a plastic greenhouse over aquaculture ponds, which is ideal for small-scale farmers. However, this requires building a structure, which can increase costs. For households in rural areas, a simpler and more cost-effective alternative is to use a cement tank that is easy to manage and maintain.
Before the water temperature drops below 5°C, it's important to prepare the pond by adding soil and shaping it into a "10"-like pattern. The soil should be compacted slightly to help the *Astragalus membranaceus* enter hibernation. The soil depth should be more than 30 cm to provide sufficient insulation. Once the water temperature falls between 0°C and 5°C, the pond should be drained completely to avoid freezing. This prevents the mud from hardening or cracking due to ice formation. To protect the soil from direct sunlight and reduce moisture evaporation, it’s recommended to cover the area with a straw curtain.
Additionally, it’s important to mist the soil in the morning and afternoon to maintain proper moisture levels. As spring approaches and the water temperature rises to around 5°C, you can gradually refill the pond with water and introduce a small amount of feed to support plant growth. This careful preparation ensures the plants survive the winter and thrive in the coming growing season.